Key-fastener



(No Model.) I E. SHADER'.

I KEY PASTENBR. No. 362,957. Patented Nov. 23, 1886 l v'itma ooeo I QfjmQm-toz 2 v 351 -o @Hozmmyr PETERS 'Pholo-Lilhvgnphun Wailinglun. D.C.

2o and shown in the accompanying drawings, in

UNITED STATES PATENT Orr-Ice.

AUGUSTUS E. SHADER, oF'onioAeo, ILLINOI KEY-FASTENER'.

. SPECIFICATION forming part of Letters Patent No. 352,957, datedNovember 23, 1886. Application filed February 20, 1886. Serial No.192,671. (No model.) I

f 0 all whom it may concern:

Be it known that I, AUGUSTUS E. SHADER, a resident of Chicago, in thecounty of Cook and State of Illinois, have invented certain new .anduseful Improvements in Key-Fasteners;

and I do hereby declare the'foltowing to be a full, clear, and exactdescription of the invention, such aswill enable others skilled in theart to which it pertains to make and use the same.

My invention relates to improvements in devices for preventing theturning of the key in a look when the same has been turned to anydesired position.

The object of the invention is to provide a simple and effective meansfor so securing the key on the inside of a door that it. cannot beturned by anyperson outside the door. The means employed for thispurpose are fully described and explained in this specification,

Figure 1 is a front elevation of a scutcheon provided with mykey-securing device, a flattened key-shank being shown in operativeconnection with the soutcheon and securer. The figure also includesdetached front elevations of the guard or securer and a spring, F,whichoperates in connection therewith. Fig. 2 is a central vertical sectionof the parts shown in principal Fig. 1. Fig. 3 is a rear elevation ofthe parts shown in section in Fig. 2. Figs. 4

and 5 are rear elevations, respectively, of slightly-modified forms ofmy invention. I

' In Figs. 1, 2, 3, A is an ordinary scutcheon, having in its rear facea gain or recess, A, of such width and depth as'to receive a flat guard,B. This guard is formed with a longitudinal slot, E, of such dimensionsas to inclose the flat shank G of an ordinary door-key, and also with ashoulder, B, which co-operates with a shoulder, S, on the soutcheon tolimit the motion of the guard in the recessA. A pin, D, is fastened tothe front face of the guard, and serves as a means of moving it in therecess in which it lies, the scutcheon being slotted at a to permit therequisite motion of the pin.

On the back of the scutcheon is aspring, F, whose lower end is rigidlyfastened,while its upper end is free and presses against the rear faceof the guard B. On the front face of the.

free end of the spring is a lug or projection,

f, and in the guard B are two holes, b b, so

placed that when the guard is at one limit of its motion the lug fenters the hole b,and when the guard is at the opposite limit the lugenters the'hole b. Either the holes I) b or the l-ugf should beconicaLin order thatwhensufficient pressure is applied to the pin D thelug may slip out of the hole in which it rests and the guard may bemoved, the only object of the spring being to prevent accidentaldisplacement of the guard. The further locking of the guard against anyattempt to move it from the outside of the door is effected by means ofa secondary guard, L, (shown in dotted lines in Fig. l and in full linesin Fig. 3,)

adapted to drop into the space between the shoulders B S and prevent thewithdrawal of the guard B when the latter is in engagement with akey-shank.

The secondary guard, like the guard B, lies in a recess in the rear faceof the scutcheon, and is provided with a rigidly-attached pin, D,Figs..1, 2, which projects through a vertical slotin the scutcheon,andaffords a means of throwing the secondary guard out of engagement withthe guard B when it is desired to withdraw the latter from thekey-shank.

The operation of the above-described device is evident. The bolt of thelock being shot, the key is turned until its flat shank is in ahorizontal plane, and the guard is then pushed inward until its slot Eincloses the shank. At this instant the lug f enters the hole I; in theguard, and thus secures it against accidental displacement, and at thesame time thesecondary guard L drops down and fastens the guard B inplace. So long as the guard B remains in the position shown in fulllines in Figs. 1, 3 the key 0 cannot be turned, and when it is desiredto turn the key the guard must be moved outward to the position shownin. dotted lines in Fig. 3.

Fig. 4 shows a slotted guard swinging about a pivot, and having in itsmargin a notch adapted to receive a secondary guard, L, of the sameconstructionand arrangement as the one shown-in the previous figures.

Fig. 5 shows a spring; G, which presses against a pin, p, on the guardand tends to force the guard inward. I think it best to have the guardfree from any force tending to press it constantly in either direction,but it Lil of the'improvement is thus included wholly in the cost ofmanufacture, and not to any extent whatever in the cost of attachment orapplication to the door.

Having now described and explained my invention, what I claim as new,and desire to secure by Letters Patent, is-

The combination of the scuteheon A, hav: ing the recess A and shoulderS, the reciprocating key-guard B, having the shoulder 13, and thesecondary guard L, adapted to enter the space between the shoulders BSwhen the key-guard is in operative position and to lock the key-guardagainst displacement, substantially as and for the purpose set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing wit- HGSSGS.

-AUGUSTUS E. SHADER. Witnesses:

ANTON H. MIOHELSEN, CHAS. W. PERKINS.

